NL257729A - - Google Patents

Info

Publication number
NL257729A
NL257729A NL257729DA NL257729A NL 257729 A NL257729 A NL 257729A NL 257729D A NL257729D A NL 257729DA NL 257729 A NL257729 A NL 257729A
Authority
NL
Netherlands
Application number
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of NL257729A publication Critical patent/NL257729A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
NL257729D 1959-12-28 NL257729A (enrdf_load_html_response)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US862186A US3089001A (en) 1959-12-28 1959-12-28 Telephone ringing circuit

Publications (1)

Publication Number Publication Date
NL257729A true NL257729A (enrdf_load_html_response)

Family

ID=25337875

Family Applications (1)

Application Number Title Priority Date Filing Date
NL257729D NL257729A (enrdf_load_html_response) 1959-12-28

Country Status (6)

Country Link
US (1) US3089001A (enrdf_load_html_response)
JP (1) JPS3818481B1 (enrdf_load_html_response)
BE (1) BE598493A (enrdf_load_html_response)
FR (1) FR1282008A (enrdf_load_html_response)
GB (1) GB965237A (enrdf_load_html_response)
NL (1) NL257729A (enrdf_load_html_response)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3247327A (en) * 1963-01-17 1966-04-19 Northern Electric Co Telephone signalling circuits

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2180334A (en) * 1938-01-20 1939-11-21 Bell Telephone Labor Inc Signaling system
US2761909A (en) * 1953-01-28 1956-09-04 Bell Telephone Labor Inc Multifrequency oscillator
US2824175A (en) * 1954-11-18 1958-02-18 Bell Telephone Labor Inc Selective ringing circuits
US2957950A (en) * 1954-11-18 1960-10-25 Bell Telephone Labor Inc Transistor selective ringing circuit
US2823266A (en) * 1955-05-10 1958-02-11 Gen Dynamics Corp Subscriber line ringing in an electronic telephone system
NL212181A (enrdf_load_html_response) * 1955-11-14

Also Published As

Publication number Publication date
GB965237A (en) 1964-07-29
FR1282008A (fr) 1962-01-19
JPS3818481B1 (enrdf_load_html_response) 1963-09-16
BE598493A (fr) 1961-04-14
US3089001A (en) 1963-05-07

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